Metal binding strip



March 13, 1934. A H, FRANKE 1,950,979

METAL BINDING STRIP Filed Dec. 27, 1932 @WMM/ Patented Mar. 13, 19341,950,97 9

UNITED STATES PATENT FFC.

METAL BINDING STRIP Arthur H. Franke, Manitowoc, Wis.

Application December 27, 1932, Serial No. 648,969 1 Claim. (Cl. 29--180lThis invention appertains to binding strips of dinal edges corrugatedfrom one end to the other, the type generally employed for connectingthe the high points of the corrugations being so edges of leather,cloth, celluloid, cellophane, etc., formed that when the strip is foldedinto a in the forming of comb cases, pocketbooks, and U-shape around theedges of the material to be 5 other articles of merchandise. clamped thesame will be transversely alined for 60 Considerable difficulty isexperienced with the iirrnly gripping the material, the iinished stripuse oi the heavy metal binding strips (which is acting to not onlyfirmly bind, or clamp, the a highly specialized material) no-w generallyemmaterial, but to give a neat and more attractive ployed, in that anyslight variation in the metal, appearance to the nished article.

either in temper, thickness, or Width, seriously With these and otherobjects in view, the in- 65 affects the clamping results in the processof vention consists in the novel construction, arproduction, either dueto possible variations in rangement, and formation of parts, as will bethe thickness of the materials clamped, such as hereinafter morespeciiically described, claimed, leather, etc., or due to the cuttingthrough or and illustrated in the accompanying drawing,

not clamping tight enough where light, thin main which drawingz- 70terials, such as light-weight celluloid or cello- Figure 1 is anenlarged fragmentary detail phane stocks are clamped or bound. viewshowing a length of the binding strip in use;

Any variations referred to above are corre- Figure 2 is a frontelevation showing the use spondingly reflected in the closing orclamping of the binding strip for making a celluloid comb 2o process,the harder parts of the strips having case, parts of the same beingshown broken away 75 a tendency to spring back, while a slight varia andin section; tion in width may cut through lightweight stocks, Figure 3is an enlarged fragmentary detail such as celluloid or cellophane, andthe narrow longitudinal, sectional view taken on the line strips willnot clamp the material tight enough, 3-3 of Figure 1, looking in thedirection of the as the same dies or methods of binding materialsarrows, illustrating the construction of the corwith metal cannot bemade to compensate for rugations; variations peculiar to the old stylebinding as now Figure 4 is an enlarged fragmentary, transin use and muchwaste of binding material and verse sectional View taken on the line 4-4of of materials bound results. Figure 1, illustrating the clampingaction; and

i 3o It is therefore a primary object oi my inven- Figure 5 is a similarview taken on the line 85 y on both of its longitudinal edges extendingfrom of thin stock such as celluloid, or the like, and

V` out injuring the stock` clamped between said ed in a flat form with aseries of corrugations 12 tion to provide a new binding of metal orother 5 5 of Figure 1, illustrating the spaces between suitablematerial, that because of its peculiar conthe clamping points of thestrip.

struction can be made in a lighter-weight stock, Referring to thedrawing in detail, wherein which will cost less and still answer itspurpose similar reference characters designate corre- 35 better than theheavier metal binding material sponding parts throughout the severalviews, the 90 now in use and will effectively overcome the difletter Agenerally indicates my improved binding iculties pointed out above.strip and B, an article of merchandise with which A further salientobject of my Iinvention is to the same can be used. In the presentinstance provide a metal binding strip having corrugations I have shownthe article B to be a comb case made one end to the other, the highpoints on the the same includes front and rear walls 10 and 11 oppositeedges of the strip being transversely bound at their longitudinal edgesand inner end alined for clamping engagement with the maedges bycontinuous strip A. This showing is terial being bound, leavingsuiiicient uninjured merely illustrative of one use of my improved4 45stock, or material, between the corrugations of binding strip, andobviously there are many other the binding to hold the stock securely,at the uses to which the strip can be put. same time overcoming thehighly specialized ob- The improved binding strip A is preferablyjections referred to, permitting the material to made, in accordancewith my invention, from be clamped at the high corrugating pointswithlight sheet metal and the same can be construct* points, therebyovercoming deciencies now exon its opposite longitudinal edges. Thesecoi-rue perienced with ordinary metal binding. gations extendtransversely of the strip from one A still further object of myinvention is to proend thereof to the other. The said corrugations videa metal binding strip which can be delivdefine transversely alined lowpoints 13 and high ered in a iiat form having its opposite longitupoints14 when the strip is folded into its U-shape, 110

as shown in the drawing. These corrugations terminate materially shortof the longitudinal center of the strip, and by referring to Figures 1,4 and 5, it can be seen that these corrugations terminate short of thefolded body portion of the strip in the said U-form. This forms asubstantially pear-shaped construction in cross section and provides ahigh round, smooth face at the outer edge of the strip and the articlebound. This forms a protection ier the users pocket and prevents tearingof the clothes.

One of the salient features oi my invention is that the low points aretransversely alined so as to rrnly clamp the stock, or material, to beheld leaving uninjured spaces of the stock between said clamping peints.The clamping action is shown in Figure 4 of the drawing, and theuninjured portions of the stock are shown in Figure 5 or the drawing.This eiectively permits the holding of the stock without injury thereto,and due to the lightness of the strip this clamping action is assured.

Furthermore, the new binding, because or its peculiar construction, canbe used in lighterweight material and while it overcomes the obstaclescaused by variations in the ordinary binding, it at the same timeprovides a heater and more attractive appearance to the material bound,giving it a certain luster and beaded effect at the corrugated edges. Atthe same time it leaves the central portion of the outside edge of thestrip bound clear and clean, retaining the advantages of the heavier,ordinary binding as now used.

Another and valuable feature of my invention is the method of formingthe corrugations, and by referring to Figure 1, it will be noted thatthe eorrugations gradually disappear from the outer edges oi the striptoward the center leaving it substantially of the desired smooth bodyportion.

Changes in details may be made without departing from the spirit or thescope of this invention, but what I claim as new isz- As a new articleof manufacture, a binding for sheet stock comprising a strip of lightsheet metal of a substantially horseshoe-shape in cross section,including inclined converging side walls and an outer arcuate connectingwall, the side wall being undulated with the undulations terminatingshort of the arcuate connecting wall, said undulations forming high andlow points on said side walls, the high points of the side walls beingin transverse alinernent, and the low point of the side walls being intransverse alinement.

ARTHUR H. FRANKE.

